AU2012377129B2 - Filter device and method for filtering a suspension - Google Patents

Filter device and method for filtering a suspension Download PDF

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Publication number
AU2012377129B2
AU2012377129B2 AU2012377129A AU2012377129A AU2012377129B2 AU 2012377129 B2 AU2012377129 B2 AU 2012377129B2 AU 2012377129 A AU2012377129 A AU 2012377129A AU 2012377129 A AU2012377129 A AU 2012377129A AU 2012377129 B2 AU2012377129 B2 AU 2012377129B2
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AU
Australia
Prior art keywords
suspension
recess plate
filter device
pipe
plate
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
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AU2012377129A
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AU2012377129A1 (en
Inventor
Bernd Boehnke
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Outotec Finland Oy
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Outotec Finland Oy
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Publication date
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Publication of AU2012377129A1 publication Critical patent/AU2012377129A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/127—Filter presses, i.e. of the plate or plate and frame type with one or more movable filter bands arranged to be clamped between the press plates or between a plate and a frame during filtration, e.g. zigzag endless filter bands
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/164—Chamber-plate presses, i.e. the sides of the filtering elements being clamped between two successive filtering plates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/12—Filter presses, i.e. of the plate or plate and frame type
    • B01D25/21—Plate and frame presses
    • B01D25/215—Construction of the filter plates, frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/30—Feeding devices ; Discharge devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D25/00—Filters formed by clamping together several filtering elements or parts of such elements
    • B01D25/30—Feeding devices ; Discharge devices
    • B01D25/302—Feeding devices ; Discharge devices specially adapted for chamber filter presses
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D37/00—Processes of filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/08—Filter cloth, i.e. woven, knitted or interlaced material

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Filtration Of Liquid (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Abstract

The invention relates to a filter device for filtering a suspension, wherein between a stationary head piece and a movable end piece, the filter device has a pack of at least a recess plate (1) and an adjacent recess plate (1), wherein running to the end piece through the pack, including through the recess plate (1) and the adjacent recess plate (1), the filter device has a suspension pipe (7) for piping a first stream of the suspension from the head piece into the pack, wherein connecting to the end piece, the filter device has a supply pipe (8) for piping a second stream of the suspension into the suspension pipe (7), wherein forming a filter chamber between the recess plate (1) and the adjacent recess plate (1), the recess plate (1) and/or the adjacent recess plate (1) has a recess (11), wherein from the suspension pipe (7), the recess plate (1) has a suspension duct (13) for piping the suspension into the filter chamber, and wherein between the recess plate (1) and the adjacent recess plate (1), the filter device has at least one filter cloth (14) for filtering a solid content out of the suspension. The invention further relates to a method for filtering a suspension in such a filter device. For avoiding the drawbacks of the state of the art, according to the invention it is suggested that the supply pipe (8) runs from the head piece to the end piece through the pack, including through the recess plate (1) and the adjacent recess plate (1).

Description

TITLE OF INVENTION Filter Device and Method for Filtering a Suspension TECHNICAL FIELD The invention relates in general to filtering and in particular to a filter device for filtering a 5 suspension and a method for filtering a suspension in a filter device. BACKGROUND ART In a prior configuration, a press filter device comprises a stationary head piece, a movable end piece, and a pack of recess plates disposed between the head piece and the end piece. A filter chamber is formed between adjacent recess plates by a recess of at least one of a 10 pair of adjacent recess plates. The filter device further comprises a suspension pipe for introducing suspension into the filter chambers of the device, wherein the suspension pipe runs from the head piece to the end piece through the pack. Moreover, the filter device is provided with a supply pipe communicating with the end piece and providing a suspension stream to the suspension pipe. In the prior filter devices, the supply pipes to the end piece 15 are flexible hoses or pipes with elbow joints, running parallel to the pack. When opening and closing the pack, one end of the supply pipe moves together with the end piece, whereas the other end remains connected to a fixed suspension source. A flexible supply pipe allows movements of the end piece, but the flexible supply pipe needs to be stiff enough for piping a high-pressure suspension from the suspension source to the end piece. 20 This high stiffness of the supply pipe always causes a torsional moment when moving the end piece. Furthermore, flexible supply pipes increase the risk of leakage of the known filter devices. Due to safety reasons, use of the prior filter devices is thus deprecated for filtering hazardous suspensions. 25 Furthermore in some filter devices, the suspension pipe runs through the pack outside the filter chamber, causing excentric pressure load of up to several tons to the end piece during the filtration cycle. Stiffness of the supply pipe and pressure load from the suspension pipe 6904339_1 (GHMatters) P98093.AU PRIYANKA -2 easily cause misalignment and deflection of the end piece, and of the recess plates of the pack. PROBLEM TO BE SOLVED Thus it would be desirable if at least an embodiment of the invention avoided one or more 5 of the drawbacks of the state of the art. SUMMARY OF INVENTION The invention describes a filter device for filtering a suspension, wherein between a stationary head piece and a movable end piece, the filter device has a pack of at least a recess plate and an adjacent recess plate, wherein running to the end piece through the 10 pack, including through the recess plate and the adjacent recess plate, the filter device has a suspension pipe for piping a first stream of the suspension from the head piece into the pack, wherein connecting to the end piece, the filter device has a supply pipe for piping a second stream of the suspension into the suspension pipe, wherein forming a filter chamber between the recess plate and the adjacent recess plate, the recess plate and/or the adjacent 15 recess plate has a recess, wherein from the suspension pipe, the recess plate has a suspension duct for piping the suspension into the filter chamber, and wherein between the recess plate and the adjacent recess plate, the filter device has at least one filter cloth for filtering a solid content out of the suspension, wherein the supply pipe runs from the head piece to the end piece through the pack, including through the recess plate and the adjacent 20 recess plate. A filter device according to embodiments of the invention avoids the need for a flexible supply pipe, and thus the torsional moment induced when moving the end piece. Preferably, in a filter device according to an embodiment of the invention the suspension pipe and the supply pipe are on opposite sides of the filter device, and of both the recess 25 plate and the adjacent recess plate. In such a filter device, loaded with the suspension on equal pressure, both the suspension pipe and the supply pipe cause individually eccentric, but together balanced pressure load to the end piece. 6904339_1 (GHMatters) P98093.AU PRIYANKA -3 Further preferred, in a filter device according to an embodiment of the invention the supply pipe has the same sectional area as the suspension pipe. If supplied with equal pressure to the same sectional area, theoretically equal streams of the suspension are induced into both the suspension pipe and the supply pipe. 5 In an advantageous specification, a filter device according to an embodiment of the invention has a duct, that is integrated into the end plate, and that connects the supply pipe to the suspension pipe. Such a filter device avoids the need for an external pipe from the supply pipe to the suspension pipe. In a filter device according to an embodiment of the invention, the recess plates of the pack 10 are vertically stacked on top of each other or hanging side by side. The filter device is secured by hydraulic force, by the weight of the stacked recess plates and/or by mechanical means. Each filter chamber is equipped with at least one filter cloth, but may be equipped with two filter cloth, where in the first case the suspension is piped into the recess of one recess plate and permeating the filter cloth to the other, and in the latter case filled in 15 between the filter cloths and permeating to both adjacent recess plates. In a filter device according to the invention, recesses may have movable membranes, the membranes and the respective recesses enclosing a squeezing chamber, that may be loaded with a squeezing fluid for mechanically pressing the remaining solid (the "filter cake"). The recess plates of a filter device according to the invention are made of plastics, e.g. 20 polypropylene (PP), or of metal, e.g. aluminium or steel. The invention further describes a method for filtering a suspension in a filter device, wherein between a stationary head piece and a movable end piece, the filter device has a pack of at least a recess plate and an adjacent recess plate, and wherein the recess plate and/or the adjacent recess plate has a recess, forming a filter chamber between the recess 25 plate and the adjacent recess plate, the method including the steps of piping a first stream of the suspension from the head piece running through a suspension pipe, that runs from the head piece to the end piece through the pack, including through both the recess plate and the adjacent recess plate, piping a second stream of the suspension from a supply pipe through the end piece into the suspension pipe, piping the suspension from the suspension 30 pipe through a suspension duct of the recess plate into the filter chamber, and directing the 6904339_1 (GHMatters) P98093.AU PRIYANKA -4 suspension through at least one filter cloth between the recess plate and the adjacent recess plate, filtering a solid content out of the suspension, wherein the supply pipe runs from the head piece to the end piece through the pack, including through the recess plate and the adjacent recess plate. 5 The method according to embodiments of the invention is executed on a filter device described supra and features the same advantages. BEST MODE FOR CARRYING OUT THE INVENTION The method according to the invention and the associated device are subsequently described in more detail with reference to a preferred embodiment illustrated in the 10 drawing figure. The figure shows a recess plate 1 of a filter device according to an embodiment of the invention. The filter device is a membrane filter press with vertically disposed recess plates 1. The filter device has a stationary head piece and a movable end piece, and a pack of hundred specimens of the recess plate 1 between the head piece and the end piece. Apart 15 from the recess plate 1, the filter device and its further components are not shown. The recess plate 1 has a substantially square base body 2, two load bearing extensions 3, 4 are applied to the base body 2 on top and two non-load bearing extensions 5, 6 at the bottom. A suspension pipe 7 runs through the extension 3 on the top left and a supply pipe 8 through the extension 6 on the bottom right. The suspension pipe 7 and the supply 20 pipe 8 both have diameters of 100 mm. The end plate has an integrated duct, that connects the supply pipe 8 to the suspension pipe 7. In the recess plate 1, a pressure medium channel 9 runs through the extension 5 on the bottom left. Filtrate channels 10 run through each of the extensions 3, 4, 5, 6. The filtrate channels 10, the suspension pipe 7, the supply pipe 8 and the pressure medium channel 9 25 extend transversally to the recess plate 1 through the filter device. On the chamber side shown in the figure, and on the membrane side (not shown), the recess plate 1 has lens shaped recesses 11, which together form a filter chamber in assembled state of the filter device, between adjacent recess plates 1. Apart from the 6904339_1 (GHMatters) P98093.AU PRIYANKA -5 recess 11, the filter chamber is not shown. A filling shoe 12 with suspension ducts 13 connects the suspension pipe 7 to the recess 11. Two filter cloths 14 (only one of them is shown) are disposed between adjacent recess plates 1 and extend in parallel thereto. During filtration, a first stream of the suspension is piped into the suspension pipe 7 and a 5 second stream of the suspension into the supply pipe 8, both at a pressure of up to 10 bar. From the suspension pipe 7, the suspension is piped into the filter chamber through the filling shoe 12 between the filter cloths 14. A solid content from the suspension settles on the filter cloths 14 as a filter cake, and a remaining liquid fraction of the suspension permeates the filter cloths 14 as a filtrate into the recesses 11 and is discharged through 10 outlets (not shown) into the filtrate channels 10. In another filter device according to an embodiment of the invention, the recess plates are basically similar to the recess plate 1 shown in the figure, but have two suspension pipes, diagonally opposed to each other, and two supply pipes, each connected to one of the suspension pipes. The other filter device and its recess plates are not shown. 15 In the claims which follow and in the preceding description of the invention, except where the context requires otherwise due to express language or necessary implication, the word "comprise" or variations such as "comprises" or "comprising" is used in an inclusive sense, i.e. to specify the presence of the stated features but not to preclude the presence or addition of further features in various embodiments of the invention. 20 6904339_1 (GHMatters) P98093.AU PRIYANKA 6 In the figures 1 recess plate 2 base body 3 extension 4 extension 5 extension 6 extension 7 suspension pipe 8 supply pipe 9 pressure medium channel 10 filtrate channel 11 recess 12 filling shoe 13 suspension duct 14 filter cloth 6904339_1 (GHMatters) P98093.AU PRIYANKA

Claims (5)

1. Filter device for filtering a suspension, wherein a. between a stationary head piece and a movable end piece, the filter device has a pack of at least a recess plate and an adjacent recess plate , b. running to the end piece through the pack, including through the recess plate and the adjacent recess plate , the filter device has a suspension pipe for piping a first stream of the suspension from the head piece into the pack, c. connecting to the end piece, the filter device has a supply pipe for piping a second stream of the suspension into the suspension pipe , d. forming a filter chamber between the recess plate and the adjacent recess plate , the recess plate and/or the adjacent recess plate has a recess , e. from the suspension pipe , the recess plate has a suspension duct for piping the suspension into the filter chamber, and f. between the recess plate and the adjacent recess plate , the filter device has at least one filter cloth for filtering a solid content out of the suspension, wherein the supply pipe runs from the head piece to the end piece through the pack, including through the recess plate and the adjacent recess plate .
2. Filter device according to the preceding claim, wherein the suspension pipe and the supply pipe are on opposite sides of the filter device, and of both the recess plate and the adjacent recess plate .
3. Filter device according to one of the preceding claims, wherein the supply pipe has the same sectional area as the suspension pipe.
4. Filter device according to one of the preceding claims, wherein a duct, that is integrated into the end plate, and that connects the supply pipe to the suspension pipe . 6904339_1 (GHMatters) P98093.AU PRIYANKA 8
5. Method for filtering a suspension in a filter device, wherein between a stationary head piece and a movable end piece, the filter device has a pack of at least a recess plate and an adjacent recess plate , and wherein the recess plate and/or the adjacent recess plate has a recess , forming a filter chamber between the recess plate and the adjacent recess plate , the method including the steps of a. piping a first stream of the suspension from the head piece running through a suspension pipe , that runs from the head piece to the end piece through the pack, including through both the recess plate and the adjacent recess plate , b. piping a second stream of the suspension from a supply pipe through the end piece into the suspension pipe, c. piping the suspension from the suspension pipe through a suspension duct of the recess plate into the filter chamber, and d. directing the suspension through at least one filter cloth between the recess plate and the adjacent recess plate, filtering a solid content out of the suspension, wherein the supply pipe runs from the head piece to the end piece through the pack, including through the recess plate and the adjacent recess plate. 6904339_1 (GHMatters) P98093.AU PRIYANKA
AU2012377129A 2012-04-19 2012-04-19 Filter device and method for filtering a suspension Active AU2012377129B2 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2012/057204 WO2013156073A1 (en) 2012-04-19 2012-04-19 Filter device and method for filtering a suspension

Publications (2)

Publication Number Publication Date
AU2012377129A1 AU2012377129A1 (en) 2014-10-02
AU2012377129B2 true AU2012377129B2 (en) 2015-10-08

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US (1) US9968871B2 (en)
EP (1) EP2838637B1 (en)
JP (1) JP2015517907A (en)
KR (1) KR20150003204A (en)
CN (1) CN104220140B (en)
AU (1) AU2012377129B2 (en)
BR (1) BR112014025401B8 (en)
CA (1) CA2867374C (en)
DK (1) DK2838637T3 (en)
EA (1) EA027747B1 (en)
ES (1) ES2731630T3 (en)
HU (1) HUE044133T2 (en)
MX (1) MX2014012469A (en)
PL (1) PL2838637T3 (en)
UA (1) UA109998C2 (en)
WO (1) WO2013156073A1 (en)
ZA (1) ZA201407442B (en)

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Publication number Priority date Publication date Assignee Title
CN110064236B (en) * 2014-12-22 2021-03-12 奥图泰(芬兰)公司 Method for manufacturing concave plate

Citations (5)

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Publication number Priority date Publication date Assignee Title
US1342839A (en) * 1919-06-23 1920-06-08 Harry T Shriver Filter
FR792928A (en) * 1934-07-28 1936-01-13 Asbestos powder filter press
US6491817B1 (en) * 1999-01-04 2002-12-10 Steve C. Benesi Shallow chamber filter apparatus
WO2005007266A1 (en) * 2003-07-11 2005-01-27 E. Begerow Gmbh & Co. Method for filtering fluids and device for implementing said method
EP2002873A1 (en) * 2007-06-08 2008-12-17 Tronox Pigments GmbH Method of filtration and filtering device

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US3669267A (en) * 1970-07-07 1972-06-13 Shriver & Co Inc T Filter press plate process and apparatus
JPS5794312A (en) * 1980-12-01 1982-06-11 Kurita Mach Mfg Co Ltd Construction of filtrate extracting of press plate
JPH0626322Y2 (en) * 1990-07-13 1994-07-20 株式会社栗田機械製作所 Compound filter press
JP3383333B2 (en) * 1992-10-29 2003-03-04 株式会社栗田機械製作所 Filter press and filtration method in the filter press
FR2718053B1 (en) 1994-04-01 1996-05-31 Interbrew Sa Elastic membrane filter press, filtration process using such a filter.
JP3104778B2 (en) * 1994-07-04 2000-10-30 株式会社石垣 Stock solution feeder in filter press
JP2001149704A (en) * 1999-11-30 2001-06-05 Kubota Corp Filter cloth washing device for filter cloth fixing type filter press
DE102007027033B4 (en) * 2007-06-08 2009-05-07 Larox Oyj Method for filtering a suspension and filter device
CN201643822U (en) * 2010-04-20 2010-11-24 景津压滤机集团有限公司 Upper-feed box-type filter plate

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1342839A (en) * 1919-06-23 1920-06-08 Harry T Shriver Filter
FR792928A (en) * 1934-07-28 1936-01-13 Asbestos powder filter press
US6491817B1 (en) * 1999-01-04 2002-12-10 Steve C. Benesi Shallow chamber filter apparatus
WO2005007266A1 (en) * 2003-07-11 2005-01-27 E. Begerow Gmbh & Co. Method for filtering fluids and device for implementing said method
EP2002873A1 (en) * 2007-06-08 2008-12-17 Tronox Pigments GmbH Method of filtration and filtering device

Also Published As

Publication number Publication date
EP2838637A1 (en) 2015-02-25
ES2731630T3 (en) 2019-11-18
US20150068986A1 (en) 2015-03-12
CN104220140B (en) 2016-08-17
KR20150003204A (en) 2015-01-08
BR112014025401B1 (en) 2021-04-06
UA109998C2 (en) 2015-10-26
DK2838637T3 (en) 2019-07-01
CA2867374C (en) 2017-11-07
JP2015517907A (en) 2015-06-25
AU2012377129A1 (en) 2014-10-02
BR112014025401A2 (en) 2017-07-11
HUE044133T2 (en) 2019-09-30
CN104220140A (en) 2014-12-17
PL2838637T3 (en) 2019-09-30
ZA201407442B (en) 2017-04-26
EA201491796A1 (en) 2015-01-30
US9968871B2 (en) 2018-05-15
CA2867374A1 (en) 2013-10-24
MX2014012469A (en) 2015-03-13
EA027747B1 (en) 2017-08-31
WO2013156073A1 (en) 2013-10-24
BR112014025401B8 (en) 2023-02-07
EP2838637B1 (en) 2019-04-03

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